Clean it up as suggested first, but if that doesn't do it, I've put the arbor in a vise and bent the follower arm a wee bit to get away from the top of the magazine.  They don't bend easily, but it doesn't take much.  I had a failure to feed on the last round in the last match I shot.  I suspect the follower got caught and wasn't pushing that last round up.  I worked the bolt again and the cartridge popped up when the bolt came all the way back.  My situation is different though, I have a newer follower with the shorter arbor in a 92/96.  The shape of the arm itself is a bit different too, seems to get the shoulder of the cases up higher.

Top is an older follower, out of a 92/96, bottom a newer one with the shorter arbor.  Notice the wave of the arm on the lower one is increased.

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